Fix a typo that caused wrong menu highlight color being used for ChromeOS.
Fix a typo that caused wrong menu highlight color being used for ChromeOS.

BUG=chromium-os:4580
TEST=Verify correct color 0xDCE4FA is used for menu highlight per chromium-os:4580.

Review URL: http://codereview.chromium.org/2861049

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@51780 0039d316-1c4b-4281-b951-d872f2087c98

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